National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

77°F

25°C

Humidity 57%
Wind Speed SE 6 mph
Barometer 29.89 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 30 Sep 7:52 pm CDT
Extended Forecast for

Carbondale IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 72. South wind 6 to 8 mph.

    Low: 72 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 90. South southwest wind 8 to 13 mph, with gusts as high as 20 mph.

    High: 90 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then showers after 4am. Low around 68. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%.

    Low: 68 °F

    Mostly Cloudy
    then Showers

  • Friday

    Friday: Showers, mainly before 1pm. High near 71. Light northwest wind becoming north northeast 6 to 11 mph in the morning. Chance of precipitation is 90%.

    High: 71 °F

    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 54. North northeast wind 6 to 9 mph.

    Low: 54 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 70. Northeast wind around 8 mph.

    High: 70 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 53. Light east northeast wind.

    Low: 53 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 73. Calm wind becoming north northeast around 6 mph in the afternoon.

    High: 73 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 52. Light north wind.

    Low: 52 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 72. South wind 6 to 8 mph.
Thursday
Partly sunny, with a high near 90. South southwest wind 8 to 13 mph, with gusts as high as 20 mph.
Thursday Night
Showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then showers after 4am. Low around 68. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%.
Friday
Showers, mainly before 1pm. High near 71. Light northwest wind becoming north northeast 6 to 11 mph in the morning. Chance of precipitation is 90%.
Friday Night
Partly cloudy, with a low around 54. North northeast wind 6 to 9 mph.
Saturday
Mostly sunny, with a high near 70. Northeast wind around 8 mph.
Saturday Night
Partly cloudy, with a low around 53. Light east northeast wind.
Sunday
Mostly sunny, with a high near 73. Calm wind becoming north northeast around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 52. Light north wind.
Monday
Sunny, with a high near 70. North northeast wind 5 to 9 mph.
Monday Night
Clear, with a low around 47. North northeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 69. East wind 3 to 6 mph.
Tuesday Night
Mostly clear, with a low around 49. Calm wind.
Wednesday
Mostly sunny, with a high near 75. Calm wind.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Carbondale IL
 37.72°N 89.23°W
Last Update:
6:26 pm CDT Sep 30, 2026
Forecast Valid:
10pm CDT Sep 30, 2026-6pm CDT Oct 7, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation